suricata
detect-isdataat.c
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1 /* Copyright (C) 2007-2020 Open Information Security Foundation
2  *
3  * You can copy, redistribute or modify this Program under the terms of
4  * the GNU General Public License version 2 as published by the Free
5  * Software Foundation.
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  * GNU General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * version 2 along with this program; if not, write to the Free Software
14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
15  * 02110-1301, USA.
16  */
17 
18 /**
19  * \file
20  *
21  * \author Pablo Rincon <pablo.rincon.crespo@gmail.com>
22  *
23  * Implements isdataat keyword
24  */
25 
26 #include "suricata-common.h"
27 #include "decode.h"
28 #include "detect.h"
29 #include "detect-engine.h"
30 #include "detect-engine-buffer.h"
31 #include "detect-parse.h"
32 #include "app-layer.h"
33 
34 #include "util-unittest.h"
35 #include "util-unittest-helper.h"
36 
37 #include "detect-isdataat.h"
38 #include "detect-content.h"
39 #include "detect-bytetest.h"
40 #include "detect-uricontent.h"
41 #include "detect-engine-build.h"
42 
43 #include "flow.h"
44 #include "flow-var.h"
45 
46 #include "util-debug.h"
47 #include "util-byte.h"
48 #include "detect-pcre.h"
49 #include "detect-byte.h"
50 
51 /**
52  * \brief Regex for parsing our isdataat options
53  */
54 #define PARSE_REGEX "^\\s*!?([^\\s,]+)\\s*(,\\s*relative)?\\s*(,\\s*rawbytes\\s*)?\\s*$"
55 
56 static DetectParseRegex parse_regex;
57 
58 int DetectIsdataatSetup (DetectEngineCtx *, Signature *, const char *);
59 #ifdef UNITTESTS
60 static void DetectIsdataatRegisterTests(void);
61 static void DetectAbsentRegisterTests(void);
62 #endif
63 void DetectIsdataatFree(DetectEngineCtx *, void *);
64 
65 static int DetectEndsWithSetup (DetectEngineCtx *de_ctx, Signature *s, const char *nullstr);
66 
67 static void DetectAbsentFree(DetectEngineCtx *de_ctx, void *ptr)
68 {
69  SCFree(ptr);
70 }
71 
72 static int DetectAbsentSetup(DetectEngineCtx *de_ctx, Signature *s, const char *optstr)
73 {
75  SCLogError("no buffer for absent keyword");
76  return -1;
77  }
78 
79  if (DetectBufferGetActiveList(de_ctx, s) == -1)
80  return -1;
81 
82  bool or_else;
83  if (optstr == NULL) {
84  or_else = false;
85  } else if (strcmp(optstr, "or_else") == 0) {
86  or_else = true;
87  } else {
88  SCLogError("unhandled value for absent keyword: %s", optstr);
89  return -1;
90  }
91  if (s->init_data->curbuf == NULL || s->init_data->list != (int)s->init_data->curbuf->id) {
92  SCLogError("unspected buffer for absent keyword");
93  return -1;
94  }
96  if (!b || b->frame) {
97  SCLogError("absent does not work with frames");
98  return -1;
99  }
100  if (s->init_data->curbuf->tail != NULL) {
101  SCLogError("absent must come first right after buffer");
102  return -1;
103  }
105  if (unlikely(dad == NULL))
106  return -1;
107 
108  dad->or_else = or_else;
109 
111  NULL) {
112  DetectAbsentFree(de_ctx, dad);
113  return -1;
114  }
115  return 0;
116 }
117 
119 {
120  bool has_other = false;
121  bool only_absent = false;
122  bool has_absent = false;
123  for (const SigMatch *sm = b->head; sm != NULL; sm = sm->next) {
124  if (sm->type == DETECT_ABSENT) {
125  has_absent = true;
126  const DetectAbsentData *dad = (const DetectAbsentData *)sm->ctx;
127  if (!dad->or_else) {
128  only_absent = true;
129  }
130  } else {
131  has_other = true;
132  if (sm->type == DETECT_CONTENT) {
133  const DetectContentData *cd = (DetectContentData *)sm->ctx;
134  if (has_absent && (cd->flags & DETECT_CONTENT_FAST_PATTERN)) {
135  SCLogError("signature can't have absent and fast_pattern on the same buffer");
136  return false;
137  }
138  }
139  }
140  }
141 
142  if (only_absent && has_other) {
143  SCLogError("signature can't have a buffer tested absent and tested with other keywords "
144  "such as content");
145  return false;
146  } else if (has_absent && !only_absent && !has_other) {
147  SCLogError(
148  "signature with absent: or_else expects other keywords to test on such as content");
149  return false;
150  }
151  return true;
152 }
153 
154 /**
155  * \brief Registration function for isdataat: keyword
156  */
158 {
159  sigmatch_table[DETECT_ISDATAAT].name = "isdataat";
160  sigmatch_table[DETECT_ISDATAAT].desc = "check if there is still data at a specific part of the payload";
161  sigmatch_table[DETECT_ISDATAAT].url = "/rules/payload-keywords.html#isdataat";
162  /* match is handled in DetectEngineContentInspection() */
166 #ifdef UNITTESTS
167  sigmatch_table[DETECT_ISDATAAT].RegisterTests = DetectIsdataatRegisterTests;
168 #endif
169  sigmatch_table[DETECT_ENDS_WITH].name = "endswith";
170  sigmatch_table[DETECT_ENDS_WITH].desc = "make sure the previous content matches exactly at the end of the buffer";
171  sigmatch_table[DETECT_ENDS_WITH].url = "/rules/payload-keywords.html#endswith";
172  sigmatch_table[DETECT_ENDS_WITH].Setup = DetectEndsWithSetup;
174 
175  sigmatch_table[DETECT_ABSENT].name = "absent";
176  sigmatch_table[DETECT_ABSENT].desc = "test if the buffer is absent";
177  sigmatch_table[DETECT_ABSENT].url = "/rules/payload-keywords.html#absent";
178  sigmatch_table[DETECT_ABSENT].Setup = DetectAbsentSetup;
179  sigmatch_table[DETECT_ABSENT].Free = DetectAbsentFree;
181 #ifdef UNITTESTS
182  sigmatch_table[DETECT_ABSENT].RegisterTests = DetectAbsentRegisterTests;
183 #endif
184 
185  DetectSetupParseRegexes(PARSE_REGEX, &parse_regex);
186 }
187 
188 /**
189  * \brief This function is used to parse isdataat options passed via isdataat: keyword
190  *
191  * \param de_ctx Pointer to the detection engine context
192  * \param isdataatstr Pointer to the user provided isdataat options
193  *
194  * \retval idad pointer to DetectIsdataatData on success
195  * \retval NULL on failure
196  */
197 static DetectIsdataatData *DetectIsdataatParse (DetectEngineCtx *de_ctx, const char *isdataatstr, char **offset)
198 {
199  DetectIsdataatData *idad = NULL;
200  char *args[3] = {NULL,NULL,NULL};
201  int res = 0;
202  size_t pcre2_len;
203  int i=0;
204 
205  pcre2_match_data *match = NULL;
206  int ret = DetectParsePcreExec(&parse_regex, &match, isdataatstr, 0, 0);
207  if (ret < 1 || ret > 4) {
208  SCLogError("pcre_exec parse error, ret %" PRId32 ", string %s", ret, isdataatstr);
209  goto error;
210  }
211 
212  if (ret > 1) {
213  const char *str_ptr;
214  res = pcre2_substring_get_bynumber(match, 1, (PCRE2_UCHAR8 **)&str_ptr, &pcre2_len);
215  if (res < 0) {
216  SCLogError("pcre2_substring_get_bynumber failed");
217  goto error;
218  }
219  args[0] = (char *)str_ptr;
220 
221 
222  if (ret > 2) {
223  res = pcre2_substring_get_bynumber(match, 2, (PCRE2_UCHAR8 **)&str_ptr, &pcre2_len);
224  if (res < 0) {
225  SCLogError("pcre2_substring_get_bynumber failed");
226  goto error;
227  }
228  args[1] = (char *)str_ptr;
229  }
230  if (ret > 3) {
231  res = pcre2_substring_get_bynumber(match, 3, (PCRE2_UCHAR8 **)&str_ptr, &pcre2_len);
232  if (res < 0) {
233  SCLogError("pcre2_substring_get_bynumber failed");
234  goto error;
235  }
236  args[2] = (char *)str_ptr;
237  }
238 
239  idad = SCMalloc(sizeof(DetectIsdataatData));
240  if (unlikely(idad == NULL))
241  goto error;
242 
243  idad->flags = 0;
244  idad->dataat = 0;
245 
246  if (args[0][0] != '-' && isalpha((unsigned char)args[0][0])) {
247  if (offset == NULL) {
248  SCLogError("isdataat supplied with "
249  "var name for offset. \"offset\" argument supplied to "
250  "this function has to be non-NULL");
251  goto error;
252  }
253  *offset = SCStrdup(args[0]);
254  if (*offset == NULL)
255  goto error;
256  } else {
257  if (StringParseUint16(&idad->dataat, 10,
258  strlen(args[0]), args[0]) < 0 ) {
259  SCLogError("isdataat out of range");
260  SCFree(idad);
261  idad = NULL;
262  goto error;
263  }
264  }
265 
266  if (args[1] !=NULL) {
267  idad->flags |= ISDATAAT_RELATIVE;
268 
269  if(args[2] !=NULL)
270  idad->flags |= ISDATAAT_RAWBYTES;
271  }
272 
273  if (isdataatstr[0] == '!') {
274  idad->flags |= ISDATAAT_NEGATED;
275  }
276 
277  for (i = 0; i < (ret -1); i++) {
278  if (args[i] != NULL)
279  pcre2_substring_free((PCRE2_UCHAR8 *)args[i]);
280  }
281 
282  pcre2_match_data_free(match);
283  return idad;
284 
285  }
286 
287 error:
288  if (match) {
289  pcre2_match_data_free(match);
290  }
291  for (i = 0; i < (ret -1) && i < 3; i++){
292  if (args[i] != NULL)
293  pcre2_substring_free((PCRE2_UCHAR8 *)args[i]);
294  }
295 
296  if (idad != NULL)
297  DetectIsdataatFree(de_ctx, idad);
298  return NULL;
299 
300 }
301 
302 /**
303  * \brief This function is used to add the parsed isdataatdata into the current
304  * signature.
305  * \param de_ctx pointer to the Detection Engine Context
306  * \param s pointer to the Current Signature
307  * \param isdataatstr pointer to the user provided isdataat options
308  *
309  * \retval 0 on Success
310  * \retval -1 on Failure
311  */
312 int DetectIsdataatSetup (DetectEngineCtx *de_ctx, Signature *s, const char *isdataatstr)
313 {
314  SigMatch *prev_pm = NULL;
315  DetectIsdataatData *idad = NULL;
316  char *offset = NULL;
317  int ret = -1;
318 
319  idad = DetectIsdataatParse(de_ctx, isdataatstr, &offset);
320  if (idad == NULL)
321  return -1;
322 
323  int sm_list;
324  if (s->init_data->list != DETECT_SM_LIST_NOTSET) {
325  if (DetectBufferGetActiveList(de_ctx, s) == -1)
326  goto end;
327  sm_list = s->init_data->list;
328 
329  if (idad->flags & ISDATAAT_RELATIVE) {
331  }
332  } else if (idad->flags & ISDATAAT_RELATIVE) {
333  prev_pm = DetectGetLastSMFromLists(s,
337  if (prev_pm == NULL)
338  sm_list = DETECT_SM_LIST_PMATCH;
339  else {
340  sm_list = SigMatchListSMBelongsTo(s, prev_pm);
341  if (sm_list < 0)
342  goto end;
343  }
344  } else {
345  sm_list = DETECT_SM_LIST_PMATCH;
346  }
347 
348  if (offset != NULL) {
349  DetectByteIndexType index;
350  if (!DetectByteRetrieveSMVar(offset, s, &index)) {
351  SCLogError("Unknown byte_extract var "
352  "seen in isdataat - %s\n",
353  offset);
354  goto end;
355  }
356  idad->dataat = index;
357  idad->flags |= ISDATAAT_OFFSET_VAR;
358  SCLogDebug("isdataat uses byte_extract with local id %u", idad->dataat);
359  SCFree(offset);
360  offset = NULL;
361  }
362 
363  /* 'ends with' scenario */
364  if (prev_pm != NULL && prev_pm->type == DETECT_CONTENT &&
365  idad->dataat == 1 &&
367  {
368  DetectIsdataatFree(de_ctx, idad);
369  DetectContentData *cd = (DetectContentData *)prev_pm->ctx;
371  ret = 0;
372  goto end;
373  }
374 
375  if (SigMatchAppendSMToList(de_ctx, s, DETECT_ISDATAAT, (SigMatchCtx *)idad, sm_list) == NULL) {
376  goto end;
377  }
378 
379  if (!(idad->flags & ISDATAAT_RELATIVE)) {
380  ret = 0;
381  goto end;
382  }
383 
384  if (prev_pm == NULL) {
385  ret = 0;
386  goto end;
387  }
388 
389  if (prev_pm->type == DETECT_CONTENT) {
390  DetectContentData *cd = (DetectContentData *)prev_pm->ctx;
392  } else if (prev_pm->type == DETECT_PCRE) {
393  DetectPcreData *pd = (DetectPcreData *)prev_pm->ctx;
395  }
396 
397  ret = 0;
398 
399 end:
400  if (offset)
401  SCFree(offset);
402  if (ret != 0)
403  DetectIsdataatFree(de_ctx, idad);
404  return ret;
405 }
406 
407 /**
408  * \brief this function will free memory associated with DetectIsdataatData
409  *
410  * \param idad pointer to DetectIsdataatData
411  */
413 {
414  DetectIsdataatData *idad = (DetectIsdataatData *)ptr;
415  SCFree(idad);
416 }
417 
418 static int DetectEndsWithSetup (DetectEngineCtx *de_ctx, Signature *s, const char *nullstr)
419 {
420  SigMatch *pm = NULL;
421  int ret = -1;
422 
423  /* retrieve the sm to apply the depth against */
425  if (pm == NULL) {
426  SCLogError("endswith needs a "
427  "preceding content option");
428  goto end;
429  }
430 
431  /* verify other conditions. */
433 
435 
436  ret = 0;
437  end:
438  return ret;
439 }
440 
441 #ifdef UNITTESTS
442 static int g_dce_stub_data_buffer_id = 0;
443 
444 /**
445  * \test DetectIsdataatTestParse01 is a test to make sure that we return a correct IsdataatData structure
446  * when given valid isdataat opt
447  */
448 static int DetectIsdataatTestParse01 (void)
449 {
450  int result = 0;
451  DetectIsdataatData *idad = NULL;
452  idad = DetectIsdataatParse(NULL, "30 ", NULL);
453  if (idad != NULL) {
454  DetectIsdataatFree(NULL, idad);
455  result = 1;
456  }
457 
458  return result;
459 }
460 
461 /**
462  * \test DetectIsdataatTestParse02 is a test to make sure that we return a correct IsdataatData structure
463  * when given valid isdataat opt
464  */
465 static int DetectIsdataatTestParse02 (void)
466 {
467  int result = 0;
468  DetectIsdataatData *idad = NULL;
469  idad = DetectIsdataatParse(NULL, "30 , relative", NULL);
470  if (idad != NULL && idad->flags & ISDATAAT_RELATIVE && !(idad->flags & ISDATAAT_RAWBYTES)) {
471  DetectIsdataatFree(NULL, idad);
472  result = 1;
473  }
474 
475  return result;
476 }
477 
478 /**
479  * \test DetectIsdataatTestParse03 is a test to make sure that we return a correct IsdataatData structure
480  * when given valid isdataat opt
481  */
482 static int DetectIsdataatTestParse03 (void)
483 {
484  int result = 0;
485  DetectIsdataatData *idad = NULL;
486  idad = DetectIsdataatParse(NULL, "30,relative, rawbytes ", NULL);
487  if (idad != NULL && idad->flags & ISDATAAT_RELATIVE && idad->flags & ISDATAAT_RAWBYTES) {
488  DetectIsdataatFree(NULL, idad);
489  result = 1;
490  }
491 
492  return result;
493 }
494 
495 /**
496  * \test Test isdataat option for dce sig.
497  */
498 static int DetectIsdataatTestParse04(void)
499 {
500  Signature *s = SigAlloc();
501  FAIL_IF_NULL(s);
502 
504 
505  FAIL_IF_NOT(DetectIsdataatSetup(NULL, s, "30") == 0);
506  SigMatch *sm = DetectBufferGetFirstSigMatch(s, g_dce_stub_data_buffer_id);
507  FAIL_IF_NOT_NULL(sm);
509  SigFree(NULL, s);
510 
511  s = SigAlloc();
512  FAIL_IF_NULL(s);
514  /* relative w/o preceeding match defaults to "pmatch" */
515  FAIL_IF_NOT(DetectIsdataatSetup(NULL, s, "30,relative") == 0);
516  sm = DetectBufferGetFirstSigMatch(s, g_dce_stub_data_buffer_id);
517  FAIL_IF_NOT_NULL(sm);
519 
520  SigFree(NULL, s);
521  PASS;
522 }
523 
524 static int DetectIsdataatTestParse06(void)
525 {
527  FAIL_IF(de_ctx == NULL);
528  de_ctx->flags |= DE_QUIET;
529 
530  Signature *s = DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any "
531  "(msg:\"Testing bytejump_body\"; "
532  "content:\"one\"; "
533  "isdataat:!4,relative; sid:1;)");
534  FAIL_IF(s == NULL);
535 
537 
539  DetectIsdataatData *data =
541 
545 
546  s = DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any "
547  "(msg:\"Testing bytejump_body\"; "
548  "content:\"one\"; "
549  "isdataat: !4,relative; sid:2;)");
550  FAIL_IF(s == NULL);
551 
553 
556 
561 
562  PASS;
563 }
564 
565 /**
566  * \test DetectIsdataatTestPacket01 is a test to check matches of
567  * isdataat, and isdataat relative
568  */
569 static int DetectIsdataatTestPacket01 (void)
570 {
571  int result = 0;
572  uint8_t *buf = (uint8_t *)"Hi all!";
573  uint16_t buflen = strlen((char *)buf);
574  Packet *p[3];
575  p[0] = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_TCP);
576  p[1] = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_UDP);
577  p[2] = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_ICMP);
578 
579  if (p[0] == NULL || p[1] == NULL ||p[2] == NULL)
580  goto end;
581 
582  const char *sigs[5];
583  sigs[0]= "alert ip any any -> any any (msg:\"Testing window 1\"; isdataat:6; sid:1;)";
584  sigs[1]= "alert ip any any -> any any (msg:\"Testing window 2\"; content:\"all\"; isdataat:1, relative; isdataat:6; sid:2;)";
585  sigs[2]= "alert ip any any -> any any (msg:\"Testing window 3\"; isdataat:8; sid:3;)";
586  sigs[3]= "alert ip any any -> any any (msg:\"Testing window 4\"; content:\"Hi\"; isdataat:5, relative; sid:4;)";
587  sigs[4]= "alert ip any any -> any any (msg:\"Testing window 4\"; content:\"Hi\"; isdataat:6, relative; sid:5;)";
588 
589  uint32_t sid[5] = {1, 2, 3, 4, 5};
590 
591  uint32_t results[3][5] = {
592  /* packet 0 match sid 1 but should not match sid 2 */
593  {1, 1, 0, 1, 0},
594  /* packet 1 should not match */
595  {1, 1, 0, 1, 0},
596  /* packet 2 should not match */
597  {1, 1, 0, 1, 0} };
598 
599  result = UTHGenericTest(p, 3, sigs, sid, (uint32_t *) results, 5);
600 
601  UTHFreePackets(p, 3);
602 end:
603  return result;
604 }
605 
606 /**
607  * \test DetectIsdataatTestPacket02 is a test to check matches of
608  * isdataat, and isdataat relative works if the previous keyword is pcre
609  * (bug 144)
610  */
611 static int DetectIsdataatTestPacket02 (void)
612 {
613  int result = 0;
614  uint8_t *buf = (uint8_t *)"GET /AllWorkAndNoPlayMakesWillADullBoy HTTP/1.0"
615  "User-Agent: Wget/1.11.4"
616  "Accept: */*"
617  "Host: www.google.com"
618  "Connection: Keep-Alive"
619  "Date: Mon, 04 Jan 2010 17:29:39 GMT";
620  uint16_t buflen = strlen((char *)buf);
621  Packet *p;
622  p = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_TCP);
623 
624  if (p == NULL)
625  goto end;
626 
627  char sig[] = "alert tcp any any -> any any (msg:\"pcre with"
628  " isdataat + relative\"; pcre:\"/A(ll|pp)WorkAndNoPlayMakesWillA"
629  "DullBoy/\"; isdataat:96,relative; sid:1;)";
630 
631  result = UTHPacketMatchSig(p, sig);
632 
633  UTHFreePacket(p);
634 end:
635  return result;
636 }
637 
638 /**
639  * \test DetectIsdataatTestPacket03 is a test to check matches of
640  * isdataat, and isdataat relative works if the previous keyword is byte_jump
641  * (bug 146)
642  */
643 static int DetectIsdataatTestPacket03 (void)
644 {
645  int result = 0;
646  uint8_t *buf = (uint8_t *)"GET /AllWorkAndNoPlayMakesWillADullBoy HTTP/1.0"
647  "User-Agent: Wget/1.11.4"
648  "Accept: */*"
649  "Host: www.google.com"
650  "Connection: Keep-Alive"
651  "Date: Mon, 04 Jan 2010 17:29:39 GMT";
652  uint16_t buflen = strlen((char *)buf);
653  Packet *p;
654  p = UTHBuildPacket((uint8_t *)buf, buflen, IPPROTO_TCP);
655 
656  if (p == NULL)
657  goto end;
658 
659  char sig[] = "alert tcp any any -> any any (msg:\"byte_jump match = 0 "
660  "with distance content HTTP/1. relative against HTTP/1.0\"; byte_jump:1,"
661  "46,string,dec; isdataat:87,relative; sid:109; rev:1;)";
662 
663  result = UTHPacketMatchSig(p, sig);
664 
665  UTHFreePacket(p);
666 end:
667  return result;
668 }
669 
670 /**
671  * \brief this function registers unit tests for DetectIsdataat
672  */
673 void DetectIsdataatRegisterTests(void)
674 {
675  g_dce_stub_data_buffer_id = DetectBufferTypeGetByName("dce_stub_data");
676 
677  UtRegisterTest("DetectIsdataatTestParse01", DetectIsdataatTestParse01);
678  UtRegisterTest("DetectIsdataatTestParse02", DetectIsdataatTestParse02);
679  UtRegisterTest("DetectIsdataatTestParse03", DetectIsdataatTestParse03);
680  UtRegisterTest("DetectIsdataatTestParse04", DetectIsdataatTestParse04);
681  UtRegisterTest("DetectIsdataatTestParse06", DetectIsdataatTestParse06);
682 
683  UtRegisterTest("DetectIsdataatTestPacket01", DetectIsdataatTestPacket01);
684  UtRegisterTest("DetectIsdataatTestPacket02", DetectIsdataatTestPacket02);
685  UtRegisterTest("DetectIsdataatTestPacket03", DetectIsdataatTestPacket03);
686 }
687 
688 static int DetectAbsentTestParse01(void)
689 {
691  FAIL_IF(de_ctx == NULL);
692  de_ctx->flags |= DE_QUIET;
693 
695  "alert http any any -> any any "
696  "(msg:\"invalid absent only with negated content\"; http.user_agent; "
697  "absent; content:!\"one\"; sid:2;)");
698  FAIL_IF(s != NULL);
699  s = DetectEngineAppendSig(de_ctx, "alert http any any -> any any "
700  "(msg:\"invalid absent\"; http.user_agent; "
701  "content:!\"one\"; absent; sid:2;)");
702  FAIL_IF(s != NULL);
703  s = DetectEngineAppendSig(de_ctx, "alert http any any -> any any "
704  "(msg:\"invalid absent\"; http.user_agent; "
705  "content:\"one\"; absent: or_else; sid:2;)");
706  FAIL_IF(s != NULL);
707  s = DetectEngineAppendSig(de_ctx, "alert http any any -> any any "
708  "(msg:\"absent without sticky buffer\"; "
709  "content:!\"one\"; absent: or_else; sid:2;)");
710  FAIL_IF(s != NULL);
712  "alert websocket any any -> any any "
713  "(msg:\"absent with frame\"; "
714  "frame: websocket.pdu; absent: or_else; content:!\"one\"; sid:2;)");
715  FAIL_IF(s != NULL);
717  PASS;
718 }
719 
720 void DetectAbsentRegisterTests(void)
721 {
722  UtRegisterTest("DetectAbsentTestParse01", DetectAbsentTestParse01);
723 }
724 #endif
util-byte.h
SigTableElmt_::url
const char * url
Definition: detect.h:1431
DETECT_CONTENT_RELATIVE_NEXT
#define DETECT_CONTENT_RELATIVE_NEXT
Definition: detect-content.h:66
DetectSignatureSetAppProto
int DetectSignatureSetAppProto(Signature *s, AppProto alproto)
Definition: detect-parse.c:2313
SignatureInitDataBuffer_::head
SigMatch * head
Definition: detect.h:548
detect-content.h
detect-engine.h
DETECT_SM_LIST_PMATCH
@ DETECT_SM_LIST_PMATCH
Definition: detect.h:118
FAIL_IF_NULL
#define FAIL_IF_NULL(expr)
Fail a test if expression evaluates to NULL.
Definition: util-unittest.h:89
SignatureInitData_::smlists
struct SigMatch_ * smlists[DETECT_SM_LIST_MAX]
Definition: detect.h:644
SigTableElmt_::desc
const char * desc
Definition: detect.h:1430
sigmatch_table
SigTableElmt * sigmatch_table
Definition: detect-parse.c:155
offset
uint64_t offset
Definition: util-streaming-buffer.h:0
ALPROTO_DCERPC
@ ALPROTO_DCERPC
Definition: app-layer-protos.h:44
SigTableElmt_::Free
void(* Free)(DetectEngineCtx *, void *)
Definition: detect.h:1418
DetectBufferGetFirstSigMatch
SigMatch * DetectBufferGetFirstSigMatch(const Signature *s, const uint32_t buf_id)
Definition: detect-engine-buffer.c:157
DetectIsdataatSetup
int DetectIsdataatSetup(DetectEngineCtx *, Signature *, const char *)
This function is used to add the parsed isdataatdata into the current signature.
Definition: detect-isdataat.c:312
DetectParseRegex
Definition: detect-parse.h:62
SigTableElmt_::name
const char * name
Definition: detect.h:1428
SignatureInitData_::smlists_tail
struct SigMatch_ * smlists_tail[DETECT_SM_LIST_MAX]
Definition: detect.h:646
DETECT_BYTEJUMP
@ DETECT_BYTEJUMP
Definition: detect-engine-register.h:83
ISDATAAT_OFFSET_VAR
#define ISDATAAT_OFFSET_VAR
Definition: detect-isdataat.h:30
DETECT_ABSENT
@ DETECT_ABSENT
Definition: detect-engine-register.h:95
SigFree
void SigFree(DetectEngineCtx *, Signature *)
Definition: detect-parse.c:2116
unlikely
#define unlikely(expr)
Definition: util-optimize.h:35
UtRegisterTest
void UtRegisterTest(const char *name, int(*TestFn)(void))
Register unit test.
Definition: util-unittest.c:103
DetectIsdataatData_::flags
uint8_t flags
Definition: detect-isdataat.h:34
DETECT_CONTENT
@ DETECT_CONTENT
Definition: detect-engine-register.h:69
SCLogDebug
#define SCLogDebug(...)
Definition: util-debug.h:269
detect-isdataat.h
SigTableElmt_::flags
uint16_t flags
Definition: detect.h:1422
DetectEngineCtx_
main detection engine ctx
Definition: detect.h:931
StringParseUint16
int StringParseUint16(uint16_t *res, int base, size_t len, const char *str)
Definition: util-byte.c:337
DetectEngineCtxFree
void DetectEngineCtxFree(DetectEngineCtx *)
Free a DetectEngineCtx::
Definition: detect-engine.c:2674
DE_QUIET
#define DE_QUIET
Definition: detect.h:329
UTHPacketMatchSig
int UTHPacketMatchSig(Packet *p, const char *sig)
Definition: util-unittest-helper.c:810
UTHBuildPacket
Packet * UTHBuildPacket(uint8_t *payload, uint16_t payload_len, uint8_t ipproto)
UTHBuildPacket is a wrapper that build packets with default ip and port fields.
Definition: util-unittest-helper.c:365
DetectIsdataatData_
Definition: detect-isdataat.h:32
DetectParsePcreExec
int DetectParsePcreExec(DetectParseRegex *parse_regex, pcre2_match_data **match, const char *str, int start_offset, int options)
Definition: detect-parse.c:3493
DetectBufferType_
Definition: detect.h:464
DetectContentData_
Definition: detect-content.h:93
DetectPcreData_::flags
uint16_t flags
Definition: detect-pcre.h:51
DetectEngineAppendSig
Signature * DetectEngineAppendSig(DetectEngineCtx *, const char *)
Parse and append a Signature into the Detection Engine Context signature list.
Definition: detect-parse.c:3439
SigTableElmt_::Setup
int(* Setup)(DetectEngineCtx *, Signature *, const char *)
Definition: detect.h:1413
detect-pcre.h
PARSE_REGEX
#define PARSE_REGEX
Regex for parsing our isdataat options.
Definition: detect-isdataat.c:54
DetectByteIndexType
uint8_t DetectByteIndexType
Definition: detect-byte.h:28
util-unittest.h
util-unittest-helper.h
FAIL_IF_NOT
#define FAIL_IF_NOT(expr)
Fail a test if expression evaluates to false.
Definition: util-unittest.h:82
DetectBufferTypeGetByName
int DetectBufferTypeGetByName(const char *name)
Definition: detect-engine.c:1157
decode.h
FAIL_IF_NOT_NULL
#define FAIL_IF_NOT_NULL(expr)
Fail a test if expression evaluates to non-NULL.
Definition: util-unittest.h:96
util-debug.h
PASS
#define PASS
Pass the test.
Definition: util-unittest.h:105
DETECT_CONTENT_ENDS_WITH
#define DETECT_CONTENT_ENDS_WITH
Definition: detect-content.h:42
de_ctx
DetectEngineCtx * de_ctx
Definition: fuzz_siginit.c:18
DetectSetupParseRegexes
void DetectSetupParseRegexes(const char *parse_str, DetectParseRegex *detect_parse)
Definition: detect-parse.c:3619
SignatureInitData_::list
int list
Definition: detect.h:630
detect.h
SigMatch_::next
struct SigMatch_ * next
Definition: detect.h:360
SigMatch_::ctx
SigMatchCtx * ctx
Definition: detect.h:359
Packet_
Definition: decode.h:492
detect-engine-build.h
ISDATAAT_RELATIVE
#define ISDATAAT_RELATIVE
Definition: detect-isdataat.h:27
DetectContentData_::flags
uint32_t flags
Definition: detect-content.h:104
DetectEngineBufferTypeGetById
const DetectBufferType * DetectEngineBufferTypeGetById(const DetectEngineCtx *de_ctx, const int id)
Definition: detect-engine.c:1177
Signature_::init_data
SignatureInitData * init_data
Definition: detect.h:749
ISDATAAT_RAWBYTES
#define ISDATAAT_RAWBYTES
Definition: detect-isdataat.h:28
SigTableElmt_::Match
int(* Match)(DetectEngineThreadCtx *, Packet *, const Signature *, const SigMatchCtx *)
Definition: detect.h:1396
detect-byte.h
DETECT_PCRE
@ DETECT_PCRE
Definition: detect-engine-register.h:71
DetectAbsentValidateContentCallback
bool DetectAbsentValidateContentCallback(Signature *s, const SignatureInitDataBuffer *b)
Definition: detect-isdataat.c:118
SigMatchCtx_
Used to start a pointer to SigMatch context Should never be dereferenced without casting to something...
Definition: detect.h:351
DETECT_SM_LIST_NOTSET
#define DETECT_SM_LIST_NOTSET
Definition: detect.h:143
SignatureInitDataBuffer_::tail
SigMatch * tail
Definition: detect.h:549
DetectBufferType_::frame
bool frame
Definition: detect.h:471
DETECT_BYTETEST
@ DETECT_BYTETEST
Definition: detect-engine-register.h:82
FAIL_IF
#define FAIL_IF(expr)
Fail a test if expression evaluates to true.
Definition: util-unittest.h:71
DetectByteRetrieveSMVar
bool DetectByteRetrieveSMVar(const char *arg, const Signature *s, DetectByteIndexType *index)
Used to retrieve args from BM.
Definition: detect-byte.c:40
suricata-common.h
DetectAbsentData_
Definition: detect-isdataat.h:37
SigMatch_::type
uint16_t type
Definition: detect.h:357
SignatureInitData_::curbuf
SignatureInitDataBuffer * curbuf
Definition: detect.h:652
detect-engine-buffer.h
SCStrdup
#define SCStrdup(s)
Definition: util-mem.h:56
UTHGenericTest
int UTHGenericTest(Packet **pkt, int numpkts, const char *sigs[], uint32_t sids[], uint32_t *results, int numsigs)
UTHGenericTest: function that perform a generic check taking care of as maximum common unittest eleme...
Definition: util-unittest-helper.c:571
SIGMATCH_OPTIONAL_OPT
#define SIGMATCH_OPTIONAL_OPT
Definition: detect.h:1630
SCMalloc
#define SCMalloc(sz)
Definition: util-mem.h:47
ISDATAAT_NEGATED
#define ISDATAAT_NEGATED
Definition: detect-isdataat.h:29
SCLogError
#define SCLogError(...)
Macro used to log ERROR messages.
Definition: util-debug.h:261
SigMatchListSMBelongsTo
int SigMatchListSMBelongsTo(const Signature *s, const SigMatch *key_sm)
Definition: detect-parse.c:839
SCFree
#define SCFree(p)
Definition: util-mem.h:61
UTHFreePacket
void UTHFreePacket(Packet *p)
UTHFreePacket: function to release the allocated data from UTHBuildPacket and the packet itself.
Definition: util-unittest-helper.c:473
DETECT_BYTE_EXTRACT
@ DETECT_BYTE_EXTRACT
Definition: detect-engine-register.h:85
detect-parse.h
SignatureInitDataBuffer_::id
uint32_t id
Definition: detect.h:539
Signature_
Signature container.
Definition: detect.h:670
SigMatch_
a single match condition for a signature
Definition: detect.h:356
DETECT_ISDATAAT
@ DETECT_ISDATAAT
Definition: detect-engine-register.h:93
DetectIsdataatData_::dataat
uint16_t dataat
Definition: detect-isdataat.h:33
DetectEngineCtxInit
DetectEngineCtx * DetectEngineCtxInit(void)
Definition: detect-engine.c:2635
DETECT_PCRE_RELATIVE_NEXT
#define DETECT_PCRE_RELATIVE_NEXT
Definition: detect-pcre.h:34
DetectPcreData_
Definition: detect-pcre.h:47
DETECT_BYTEMATH
@ DETECT_BYTEMATH
Definition: detect-engine-register.h:84
detect-uricontent.h
SIGMATCH_NOOPT
#define SIGMATCH_NOOPT
Definition: detect.h:1620
DetectGetLastSMFromLists
SigMatch * DetectGetLastSMFromLists(const Signature *s,...)
Returns the sm with the largest index (added latest) from the lists passed to us.
Definition: detect-parse.c:640
SigMatchAppendSMToList
SigMatch * SigMatchAppendSMToList(DetectEngineCtx *de_ctx, Signature *s, uint16_t type, SigMatchCtx *ctx, const int list)
Append a SigMatch to the list type.
Definition: detect-parse.c:464
DetectEngineCtx_::flags
uint8_t flags
Definition: detect.h:933
SigAlloc
Signature * SigAlloc(void)
Definition: detect-parse.c:1996
flow.h
SignatureInitDataBuffer_
Definition: detect.h:538
DETECT_CONTENT_FAST_PATTERN
#define DETECT_CONTENT_FAST_PATTERN
Definition: detect-content.h:34
DetectAbsentData_::or_else
bool or_else
Definition: detect-isdataat.h:39
DETECT_ENDS_WITH
@ DETECT_ENDS_WITH
Definition: detect-engine-register.h:74
DetectBufferGetActiveList
int DetectBufferGetActiveList(DetectEngineCtx *de_ctx, Signature *s)
Definition: detect-engine-buffer.c:109
flow-var.h
DetectIsdataatFree
void DetectIsdataatFree(DetectEngineCtx *, void *)
this function will free memory associated with DetectIsdataatData
Definition: detect-isdataat.c:412
SigTableElmt_::RegisterTests
void(* RegisterTests)(void)
Definition: detect.h:1420
DetectIsdataatRegister
void DetectIsdataatRegister(void)
Registration function for isdataat: keyword.
Definition: detect-isdataat.c:157
app-layer.h
detect-bytetest.h
UTHFreePackets
void UTHFreePackets(Packet **p, int numpkts)
UTHFreePackets: function to release the allocated data from UTHBuildPacket and the packet itself.
Definition: util-unittest-helper.c:456